Molded plastic drawer

ABSTRACT

A molded plastic drawer for use in cabinets having central guide rails comprises a normally horizontally disposed bottom wall and front, side, and back walls extending upwardly from the bottom wall. The bottom wall is provided with reinforcing ribs including guiding portions which engage the lower guide rail of the cabinet to guide the drawer during movement between opened and closed conditions. The reinforcing ribs also include retaining portions which engage structure of the cabinet to normally retain the drawer in the closed condition. The side and back walls of the cabinet extend to horizontal lips and are provided with ribs which reinforce the walls and the lips. The horizontal lip of the back wall is positioned above the lips of the side wall and extends across the full width of the drawer to define an elongate shoulder positioned for engagement with structure of the cabinet when the drawer is in the opened condition to prevent the drawer from falling out of the cabinet. The upper portion of the back wall further comprises a groove which receives the upper guide rail of the cabinet and thereby cooperates with guiding portions of the reinforcing ribs on the bottom wall to guide the drawer during inward and outward movement relative to the cabinet.

United States Patent 91 Noneman et a].

[ 1 Mar. 12, 1974 MOLDED PLASTIC DRAWER Primary Examiner-James T. McCall [75] Inventors: Thomas S. Noneman; Thomas R. Attorney Agent or FlrmflRlchards" Hams &

Smith; John B. Stokes, all of Bryan, Medlock Ohio 73 Assignee: Tomco Plastic lnc., Bryan, Ohio [57] ABSTRACT A molded plastic drawer for use in cabinets having [22] Filed May central guide rails comprises a normally horizontally [2l] Appl. No.: 252,847 disposed bottom wall and front, side, and back walls extending upwardly from the bottom wall. The bottom wall is provided with reinforcing ribs including guiding 3l2/333 igi i portions which engage the lower guide rail of the cabii 311 296 net to guide the drawer during movement between 5 53 293 opened and closed conditions. The reinforcing ribs I also include retaining portions which engage structure R f Ct d of the cabinet to normally retain the drawer in the e erenceb l e closed condition. The side and back walls of the cabi- UNITED STATES PATENTS net extend to horizontal lips and are provided with 1,306,257 6/1919 Horix 312/330 UX ribs which reinforce the walls and the lips. The horil,390.377 9/1921 h t n t 312/342 X zontal lip of the back wall is positioned above the lips 946,789 2/1934 alesemann 312/342 of the side wall and extends across the full width of 5 3 g igi Kerlmedy 312/342 the drawer to define an elongate shoulder positioned gggi' 2x 5 12 2 a i for engagement with structure of the cabinet when the 2997'355 8/1961 xx: 312/342 drawer is in the opened condition to prevent the 310281207 4/1962 Darnell; 2/347 X drawer from falling out of the cabinet. The upper por- 3 30 97 19 5 Mulch 206/] R tron of the back wall further comprises a groove which 3,289,044 11/1966 Ginsberg 312/347 receives the upper guide rail of the cabinet and 3,371,976 3/1968 Ritz, Jr. 312/348 thereby cooperates with guiding portions of the rein- 3.490,602 H Wenlzelm 211/126 forcing ribs on the bottom wall to guide the drawer 3580941 8/1972 Shanks 2/333 during inward and outward movement relative to the 600,742 3/l898 Porter. 312/345 X cabinet 2,660,506 ll/l953 Wright 312/345 X t 20 Claims, 4 Drawing, Figures 2O 22 ueea K is; W (a 48 I6 40 I4 Q Q 64 se la 2M k 1 w 18 1 MOLDED PLASTIC DRAWER BACKGROUND AND SUMMARY OF THE INVENTION rails. In such instances it is necessary to provide draw ers having structure which receives the guide rails and thereby guides the drawers during inward and outward movement. It has also been found advantageous to equip the drawers with retention structure. This is both to prevent the drawers to accidentally falling out of the cabinet during transportation of a recreational vehicle and for preventing the drawers from moving entirely out of the cabinet when the drawers are intentionally opened.

It is well known that drawers fabricated by the injection molding process are well suitedfor use in cabinets having central guide rails. For example, US. Pat. No.

3,582,172 granted to Riley on June 1', 1971, is illustrative of the prior art. However, notwithstanding the relatively widespread use of molded plasticdoors in such applications, a number of problems have remained'unwhen heavily loaded, and in some instances crack to such an extent as to no longer be usable. Also, drawers of the type disclosed in the aforementioned Riley Patent do not exhibit adequate drawer retention structure. That is, even though the drawers are equipped with locking lugs which are designed to retain the drawers in the closed condition during transportation of a recreational vehicle, the drawers often become dislodged and fall out of their cabinets. Similarly, the provisions of drawers of the type shown in the Riley Patent for preventing the "drawers from moving fully out of their cabinets when they are intentionally opened have also been found to be less than wholly satisfactory.

The present invention comprises a molded plastic drawer which overcomes the foregoing and other disadvantageous characteristics that have long since characteristized the prior art. In accordance with the broader aspects of the invention, a molded plastic drawer includes a bottom wall having reinforcing ribs on its underside which extend the full length of' the drawer and which are spaced to receive the lower central guide rail of a cabinet. At the front end of a drawer the reinforcing ribs extend outwardly to provide structure for retaining the drawer in the closed condition which extends entirely across the drawer.

The drawer further comprises front, side and back walls extending upwardly from the bottom wall. The side walls and the back wall are provided with horizontal lips. However, the lip of the back wall is positioned substantially above the lips of the side walls and is equipped with a groove for receiving the upper guide rail of the cabinet. By this means there is provided a shoulder extending'entirely across the drawer which retains the drawer in the opened condition.

DESCRIPTION OF THE DRAWINGS A more complete understanding of the invention may be had by referring to the following Detailed Description when taken in conjunction with the accompanying Drawings, wherein:

FIG. 1 is a side view of a drawer incorporating the invention showing the drawer in use;

FIG. 2 is a top view of the drawer;

FIG. 3 is a back view showing the drawer in use; and

FIG. 4 is a bottom view of the drawer.

DETAILED DESCRIPTION Referring nowto the Drawings and particularly to FIG. 1, there is shown a pair of drawers l0 incorporating the present invention. The drawers 10 are normally housed in a cabinet 12 of the type utilized in recreational vehicles and in similar applications. The cabinet 12 comprises one or more spaces 14 each of which receives one of the drawers 10.v

More specifically, the cabinet 12 comprises vertical framing members 16 and horizontal framing members 18 extending between and connected to the vertical framing members 16. The framing members 16 and 18 of the cabinet 12 are typically so arranged as to'define the outline of each drawer receiving space 14 in the cabinet 12. Guide rails 20 extend between the horizontal framing members 18 and are centrally disposed relative to the vertical framing members 16. It will be understood that in the case of a cabinet 12 having vertically stackeddrawer receiving spaces 14, certain of the guiderails 20 serve both as the upper guide rail for one drawer receiving space 14 and as the lower guide rail for the next adjacent drawerreceiving space 14. In many applications the cabinet 12 further includes an upper panel 22 which servesboth to enclose the cabinet and as a shelf or countertop.

Referring now to FIG. 2', the drawer ,10 comprises a normally horizontally disposed bottom wall 24 having a rear edge 26, opposed side edges 28 and a front edge 30. A back wall 32 and opposed side walls 34 extend vertically and slightly outwardly from the back and side edges 26 and 28 of the bottom wall 24, respectively. A

front wall 36 extends vertically-from the front edge 30.

of the bottom wall 24. As is best shown in FIG. 1, the front wall 36 is adapted to receive a decorative face plate 38 which is secured to the front wall 36'of the drawer 10 by threaded fasteners 40 or other suitable means. The face plate 38 may be formed from wood, plastic, or other materials as desired, and may include a drawer pull 42 and/or other hardware.

The side walls 34 of the drawer 1l0 extends upwardly from the bottom wall 24 to upper horizontal lips 44. Each side-wall 34 is further provided with a plurality of wedge-shaped ribs 46 which serve to reinforce both the side walls 34 and the lips 44. As is best shown in FIG. 3, the back wall 32 is similarly constructed in that it extends to an upper horizontal lip 48 and is provided with a plurality of wedge-shaped ribs 50 which serve to rein force both the lip-48 and the back wall 32. It will be noted that the lip 48 of the back wall 32 is positioned substantially above the lips 44 of the side walls 34 and is provided with a groove 52. The groove 52 of the back The positioning of the horizontal lip 48 of the rear wall 32 substantially above the horizontal lips 44 of the side walls 34 comprises an important advantage to the use of the present invention. Referring both to FIG. 1 and to FIG. 3, the raised positioning of the lip 48 provides a shoulder 54 at the upper edge of the back wall 32 which extends across substantially the entire width of the drawer 10. When the drawer is moved to its fully opened position relative to the cabinet 12, the shoulder 54 engages the upper forward horizontal framing member 18 of its respective drawer receiving space 14 and thereby serves to prevent the drawer 10 from falling out of the cabinet 12. Since the shoulder 54 extends a substantial distance-across the back wall 32, this important function is accomplished notwithstanding the fact that the drawer 10 may become skewed in the cabinet 12 due to unbalanced loading,

etc.

Referring now to FIG. 4, the underside of the bottom wall 24 of the drawer 10 is provided with two sets of oppositely disposed reinforcing ribs 56 and 58 which serve to prevent undue deformation of the drawer 10 when it is heavily loaded. In the practice of the invention it has been found that the reinforcing ribs 56 can be dispensed with in the case of smaller drawers. On the other hand, the reinforcing ribs 58 are utilized both in small drawers and in large drawers.

The reinforcing ribs 58 each comprise a guide portion 60 and a retaining portion 62. The guide portions 60 of the ribs 58 extend generally parallel to the side edges 28 of the bottom wall 24 from points adjacent the rear edge 26 to points adjacent the front edge 30. The retaining portions 62 of the ribs 58 in turn extend parallel to the front edge 30 between the front ends of the guiding portions 60 and points adjacent the side edges 28 of the bottom wall 24.

As is best shown in FIGS. 1 and 3, the guiding portions 60 of the reinforcing ribs 58 of each drawer 10 engage the lower guide rail of its respective drawer receiving space 14. By this means the guiding portions 60 co-operate with the groove 52 of the back wall 32 to guide the drawer 10 during inward and outward movement of the drawer relative to the cabinet 12. The retaining portions 62 of the reinforcing ribs 58, of each drawer l0 are positioned for engagement with the lower forward horizontal framing member 18 of its respective drawer receiving space 14. The retaining portions 62 therefore serve to lock the drawer 10 in the closed condition even though the cabinet 12 may be severely vibrated due to transportation of a recreational vehicle incorporating the cabinet 12, etc.

Referring specifically to FIG. 1, the drawer 10 further includes secondary retaining members 64 which project downwardly from the guiding portions 60 of the reinforcing ribs 58. The secondary retaining members 64 do not normally engage any portion of the cabinet 12. However, should the cabinet 12 be vibrated sufficiently to dislodge the retaining portions 62 of the reinforcing ribs' 58 from the lower forward horizontal framing member 18, the secondary retaining members 64 engage thev lower forward horizontal framing member 18 to prevent the drawer 10 from falling completely out of its respective drawer receiving space '14 in the cabinet 12.

In use, the drawer 10 is normally enclosed by the cabinet 12 in the manner illustrated in FIG. 1. Whenever it is desired to open the drawer 10, the front end of the drawer is raised slightly to clear the retaining portions 62 of the reinforcing ribs 58 and the secondary retaining members'64 over the adjacent horizontal framing member 18. The drawer 10 is then slid outwardly to whatever extent may be desired. During this movement the drawer 10 is guided by cooperation of the groove 52 in the rear wall 32 and by cooperation of the guiding portions 60 of the reinforcing ribs 58 with the upper and lower guide rails 20 of the drawer receiving space 14 which encloses the drawer 10.

If the drawer 10 is moved to the fully opened position the shoulder 54 of the rear wall 32 of the drawer 10 engages the upper forward horizontally framing member 18 to prevent the drawer 10 from falling completely out of the cabinet 12. However, the drawer 10 is easily disengaged from thecabinet 12 by simply tilting the front end of the drawer upwardly. The drawer 10 is returned to the closed position illustrated in FIG. 1 by simply sliding the drawer 10 rearwardly in the cabinet 12. As the drawer 10 reaches the closed position the retaining portions 62 of the reinforcing ribs 58 drop behind the lower forward horizontal framing member 18 and thereafter serve to retain the drawer 10 in the closed condition.

As will be readily appreciated by those skilled in the art, the entire drawer 10, except for the face plate 38 and the fasteners 40, comprises an integral structure. The drawer 10 is specifically designed for economical manufacture by means of conventional injection molding techniques. It is further contemplated that conventional materials, for example, high impact polystyrene, will be utilized in the manufacture of drawers incorporating the invention.

From the foregoing it will be understood that the present invention comprises a molded plastic drawer incorporating numerous advantages over the prior art.

Thus, drawers constructed in accordance with the present invention are provided with an elongate shoulder at the upper edge of the back wall which functions to prevent the drawer from moving fully out of the cabinet when the drawer is in the fully opened position. The bottom and side walls of the drawer are provided with reinforcing ribs so that the drawer is not unduly deformed when it is heavily loaded. The reinforcing ribs of the bottom wall further serve to retain the drawer in the closed position and to cooperate with a groove formed in the back wall to guide the drawer-during inv ward and outward movement relative to the cabinet.

Although preferred embodiments of the invention have been illustrated in the accompanying Drawings and described in the foregoing Detailed Description, it I will be understood that the invention is not limited to the embodiments disclosed, but is capable of numerous rearrangements, modifications, and substitutions in parts and elements without departing from the spirit of the invention.

What is claimed is:

l. A molded plastic drawer for recreational vehicles comprising:

a normally horizontal bottom wall extending to nor-' mally substantially vertical front, side and back walls integrally formed therewith;

said side walls having lips integrally formed therewith and extending alongtheir upper edges at a predetermined height above the bottom wall;

said back wall having a lip integrally formed therewith and extending along substantially its entire upper edge at a point above the lips of the side walls to provide an elongate, substantially full width shoulder for retaining the drawer in the opened condition, said lip having a groove formed in it for receiving an upper guide rail;

said bottom wall having a pair of reinforcing ribs integrally formed therewith and extending along its underside from points adjacent the back wall to points adjacent the front wall and spaced to receive a lower guide rail, said ribs terminating at their front ends in portions extending outwardly to points adjacent the side walls to provide elongate members for restraining the drawer in the closed condition.

2. The molded drawer according to claim 1 wherein guide rail of I wherein the reinforcig ribs of the bottom wall further the reinforcing ribs on the bottom wall are further characterized by:

guiding portions extending from points adjacent the rear wall parallel to the side walls to points adjacent the front wall and spaced to receive the lower guide rail;

primary restraining portions extending from the guiding portions parallel to the front wall to points adjacent the side walls for restraining the drawer in the closed condition; and

secondary restraining portions depending from the guiding portions and positioned rearwardly of the primary restraining portions for restraining the drawer in the event the drawer becomes dislodged from the primary restraining portions.

3. The molded drawer according to claim 1 wherein the guiding portions of the reinforcing ribs on the bottom wall extend generally parallel to the side walls, wherein the restraining portions of the reinforcing ribs extend generally parallel to the front wall, and further including portions extending angularly relative to the front and side walls for cooperation with the guiding and restraining portions to reinforce the bottom wall of the drawer.

4. Themolded plastic drawer according to claim 1 wherein back and side wall ofthe drawer is further provided with a plurality of wedge-shaped ribs extending between the wall and its horizontal lip to reinforce the wall and the lip.- v

5. A molded plastic drawer for a cabinet having upper and lower guide rails which comprises a bottom wall including front, side and back edges, reinforcing ribs formed integrally with and disposed on the underside of the bottom wall and extending from points adja-' cent the'back edge parallel to the side edges to points adjacent the front edge and then parallel to the front edge to points adjacent the side edges, the portions of the reinforcing ribs extending parallel to the side edges being spaced to receive the lower guide rail of the cabinet, the portions of the reinforcing ribs extending parallel to the front edge being positioned for cooperation with the cabinet to restrain the drawer in the closed condition; back and side walls integrally formed with and rising upwardly and slightly outwardly from the back and side edges of the bottom wall, a front wall integrally formed with and rising upwardly from the front I edge of the bottom wall, an outwardly extending lip on the back and side walls and formed integrally therewith, the lip of the back wall being positioned above the lips of the side walls to provide an elongate shoulder for restraining the drawer in the opened condition and ininclude members depending from the portions extending parallel to the side edges at points positioned rearwardly of the portions extending parallel to the front edge for secondarily restraining the drawer in the closed condition.

8. The molded drawer according to claim 5 wherein the reinforcing ribs on the bottom wall further include portions extending angularly relative to the edges of the bottom wall for cooperation with theportions extending parallel to the front and side edges to reinforce the bottom wall.

9. In a recreational vehicle, the improvement comprising: j

a cabinet including upper and lower transversely extending framing members and centrally disposed longitudinally extending guide rails; a molded plastic drawer mounted in the cabinet for movement between opened and closed conditions;

said drawer comprising a bottom wall and front, side and back walls rising upwardlyfrom the bottom wall;

said back and side walls extending to horizontal lips with the lip of the back wall positioned substantially above the lips of the side walls to define a shoulder extending substantially the entire width of the back wall for engagement with the upper framing member of the cabinet to retain the drawer in the opened condition and defining a groove which receives the upper guide rail to guide the drawer movement relative to the cabinet;

said bottom wall having a pair of reinforcing ribs .ex-

tending along its underside from points adjacent the back wall to points adjacent the front wall and spaced to receive the lower guide rail of the cabinet and thereby cooperate with the groove in the back wall in guiding the drawer, saidribs terminating at their front ends in portions extending outwardly to points adjacent the side walls to provide elongate members for engaging the lower framing member of the cabinet and thereby normally retaining the drawer in the closed condition. 10. The improvement according; to claim 9 wherein the guiding portions of the reinforcing ribs on the bottom wall extend generally parallel to the side walls and wherein the retaining portions extend generally parallel to the front wall and wherein each back and side wall further comprises a plurality of reinforcing ribs. 11. A molded plastic drawer adapted for use in a space defined by a front frame having at least parallel top and bottom transversely extending frame members and guide rails extending rearwardly from said top and bottom frame members, said drawer comprising:

a generally horizontal bottom wall extending to normally substantially vertical front, side and back walls;

said back wall having a shoulder extending substantially across the width of said back wall, said wall and shoulder projecting vertically to a height greater than the spacing between said top and hottom frame members whereby said shoulder will retain said drawer in an open condition in substantially full width engagement with said top frame member; and

guide means comprising a groove in said shoulder for receiving said top guide rail and longitudinally extending parallel reinforcing ribs on the underside of said bottom wall along substantially the full length of said drawer for receiving said bottom guide rail whereby said drawer is guided during entire opening and closing travel so as to prevent skewing of the drawer.

12. The molded plastic drawer according to claim 11 wherin the guide rails are substantially centrally located transversely of the front frame, and wherein the guide means of the drawer are substantially centrally located between the side walls.

13. The molded plastic-drawer according to claim 12 further characterized by an outwardly turned lip extending along the upper edges of the back and side walls.

14. The molded plastic drawer according to claim 13 further characterized by retaining members extending transversely outwardly from the front ends of the reinforcing ribs on the under side of the bottom wall for mally substantially vertical front, side and back walls formed integrally with the bottom wall;

said drawer being adapted for support by engagement of the bottom wall with the bottom frame member and the bottom rail;

said back wall having a shoulder formed integrally therewith extending substantially across the width of said back wall, said shoulder projecting vertically to a height greater than the spacing between said top and bottom frame members whereby said shoulder will retain said drawer in an open condition in substantially full width engagement with said top frame member; and

guide means comprising a groove in said shoulder for receiving said top rail whereby said drawer is guided during entire opening and closing travel so as to prevent skewing of the drawer.

16. The molded plastic drawer according to claim 15 further characterized by a reinforcing lip extending first outwardly and then downwardly from the back and side walls, said lip extending parallel to the bottom wall along one side wall and around the adjacent rear corner, then upwardly to define one end of the shoulder of the back wall, then parallel to the bottom wall along the top of the shoulder, then downwardly to define one side of the groove, then parallel to the bottom wall to define the bottom of the groove, then upwardly to define the opposite side of the groove, then parallel to the bottom wall along the top of the shoulder, then downwardly to define the opposite end of the shoulder, then parallel to the bottom wall around the opposite rear corner and along the opposite side wall.

17. The molded plastic drawer according to claim 16 further characterized by opposed, longitudinally disposed, substantially parallel reinforcing ribs extending along the underside of the bottom wall substantially the full length of the drawer for receiving the bottom rail so that the draweris guided both by the groove in the shoulder and the reinforcing ribs.

18. A molded plastic drawer adapted for use in a space defined by a front frame having at least parallel top and bottom transversely extending frame members, a top rail extending rearwardly from said top frame member, and at least one bottom rail extending rearwardly from said bottom frame member, said drawer comprising:

a generally horizontal bottom wall extending to normally substantially vertical front, side and back walls formed integrally with the bottom wall;

said back wall having a shoulder extending substantially across the width of said back wall, said shoulder projecting vertically to a height greater than the spacing between said top and bottom frame members whereby said shoulder will retain the drawer in an open condition by substantially full width engagement with said top frame member;

guide means comprising a groove in said shoulder for receiving said top rail whereby said drawer is guided during its entire opening and closing travel so as to prevent skewing of the drawer; and

said side and back walls having integrally formed therewith an outwardly turned lip extending first parallel to the bottom wall along one side wall and around the adjacent rear corner, then upwardly to define one end of the shoulder of the back wall, then parallel to the bottom wall along the top of the shoulder, then downwardly to define one side of the groove, then parallel to the bottom wall to define the bottom'of the groove, then upwardly to define the opposite side of the groove, then parallel to the bottom wall along the top of the shoulder, then downwardly to define the opposite end of the shoulder, then parallel to the bottom wall around the opposite rear corner and along the opposite side wall.

19. The molded plastic drawer according to claim 18 further including means on the underside of the bottom wall for receiving the bottom rail so that skewing of the drawer is prevented both by cooperation of the groove in the shoulder with the top rail and by cooperation of the guide means on the underside of the bottom wall with the bottom rail.

20. The molded plastic drawer according to claim 19 wherein the front wall extends substantially perpendicularly to the bottom wall and is adapted to receive drawer hardware, and wherein the back and side walls taper upwardly and outwardly relative to the bottom wall, and further including retaining members extending transversely across the front end of the underside of the bottom wall for substantially full width engagement with the bottom transversely extending member of the front frame to retain the drawer in a closed condition. 

1. A molded plastic drawer for recreational vehicles comprising: a normally horizontal bottom wall extending to normally substantially vertical front, side and back walls integrally formed therewith; said side walls having lips integrally formed therewith and extending along their upper edges at a predetermined height above the bottom wall; said back wall having a lip integrally formed therewith and extending along substantially its entire upper edge at a point above the lips of the side walls to provide an elongate, substantially full width shoulder for retaining the drawer in the opened condition, said lip having a groove formed in it For receiving an upper guide rail; said bottom wall having a pair of reinforcing ribs integrally formed therewith and extending along its underside from points adjacent the back wall to points adjacent the front wall and spaced to receive a lower guide rail, said ribs terminating at their front ends in portions extending outwardly to points adjacent the side walls to provide elongate members for restraining the drawer in the closed condition.
 2. The molded drawer according to claim 1 wherein the reinforcing ribs on the bottom wall are further characterized by: guiding portions extending from points adjacent the rear wall parallel to the side walls to points adjacent the front wall and spaced to receive the lower guide rail; primary restraining portions extending from the guiding portions parallel to the front wall to points adjacent the side walls for restraining the drawer in the closed condition; and secondary restraining portions depending from the guiding portions and positioned rearwardly of the primary restraining portions for restraining the drawer in the event the drawer becomes dislodged from the primary restraining portions.
 3. The molded drawer according to claim 1 wherein the guiding portions of the reinforcing ribs on the bottom wall extend generally parallel to the side walls, wherein the restraining portions of the reinforcing ribs extend generally parallel to the front wall, and further including portions extending angularly relative to the front and side walls for cooperation with the guiding and restraining portions to reinforce the bottom wall of the drawer.
 4. The molded plastic drawer according to claim 1 wherein back and side wall of the drawer is further provided with a plurality of wedge-shaped ribs extending between the wall and its horizontal lip to reinforce the wall and the lip.
 5. A molded plastic drawer for a cabinet having upper and lower guide rails which comprises a bottom wall including front, side and back edges, reinforcing ribs formed integrally with and disposed on the underside of the bottom wall and extending from points adjacent the back edge parallel to the side edges to points adjacent the front edge and then parallel to the front edge to points adjacent the side edges, the portions of the reinforcing ribs extending parallel to the side edges being spaced to receive the lower guide rail of the cabinet, the portions of the reinforcing ribs extending parallel to the front edge being positioned for cooperation with the cabinet to restrain the drawer in the closed condition; back and side walls integrally formed with and rising upwardly and slightly outwardly from the back and side edges of the bottom wall, a front wall integrally formed with and rising upwardly from the front edge of the bottom wall, an outwardly extending lip on the back and side walls and formed integrally therewith, the lip of the back wall being positioned above the lips of the side walls to provide an elongate shoulder for restraining the drawer in the opened condition and including a groove for receiving the upper guide rail of cabinet.
 6. The molded plastic drawer according to claim 5 wherein the bottom wall normally extends horizontally and where the front wall normally extends vertically and is adapted to receive drawer hardware.
 7. The molded plastic drawer according to claim 5 wherein the reinforcig ribs of the bottom wall further include members depending from the portions extending parallel to the side edges at points positioned rearwardly of the portions extending parallel to the front edge for secondarily restraining the drawer in the closed condition.
 8. The molded drawer according to claim 5 wherein the reinforcing ribs on the bottom wall further include portions extending angularly relative to the edges of the bottom wall for cooperation with the portions extending parallel to the front and side edges to reinforce the bottom wall.
 9. In a recreational vehicle, the improvement comprising: a cabinet including upper and lower transversely extending framing members and centrally disposed longitudinally extending guide rails; a molded plastic drawer mounted in the cabinet for movement between opened and closed conditions; said drawer comprising a bottom wall and front, side and back walls rising upwardly from the bottom wall; said back and side walls extending to horizontal lips with the lip of the back wall positioned substantially above the lips of the side walls to define a shoulder extending substantially the entire width of the back wall for engagement with the upper framing member of the cabinet to retain the drawer in the opened condition and defining a groove which receives the upper guide rail to guide the drawer movement relative to the cabinet; said bottom wall having a pair of reinforcing ribs extending along its underside from points adjacent the back wall to points adjacent the front wall and spaced to receive the lower guide rail of the cabinet and thereby cooperate with the groove in the back wall in guiding the drawer, said ribs terminating at their front ends in portions extending outwardly to points adjacent the side walls to provide elongate members for engaging the lower framing member of the cabinet and thereby normally retaining the drawer in the closed condition.
 10. The improvement according to claim 9 wherein the guiding portions of the reinforcing ribs on the bottom wall extend generally parallel to the side walls and wherein the retaining portions extend generally parallel to the front wall and wherein each back and side wall further comprises a plurality of reinforcing ribs.
 11. A molded plastic drawer adapted for use in a space defined by a front frame having at least parallel top and bottom transversely extending frame members and guide rails extending rearwardly from said top and bottom frame members, said drawer comprising: a generally horizontal bottom wall extending to normally substantially vertical front, side and back walls; said back wall having a shoulder extending substantially across the width of said back wall, said wall and shoulder projecting vertically to a height greater than the spacing between said top and bottom frame members whereby said shoulder will retain said drawer in an open condition in substantially full width engagement with said top frame member; and guide means comprising a groove in said shoulder for receiving said top guide rail and longitudinally extending parallel reinforcing ribs on the underside of said bottom wall along substantially the full length of said drawer for receiving said bottom guide rail whereby said drawer is guided during entire opening and closing travel so as to prevent skewing of the drawer.
 12. The molded plastic drawer according to claim 11 wherin the guide rails are substantially centrally located transversely of the front frame, and wherein the guide means of the drawer are substantially centrally located between the side walls.
 13. The molded plastic-drawer according to claim 12 further characterized by an outwardly turned lip extending along the upper edges of the back and side walls.
 14. The molded plastic drawer according to claim 13 further characterized by retaining members extending transversely outwardly from the front ends of the reinforcing ribs on the under side of the bottom wall for substantially full width engagement with bottom transversely extending member of the front frame to retain the drawer in a closed condition.
 15. A molded plastic drawer adapted for use in a space defined by a front frame having at least parallel top and bottom transversely extending frame members, a top rail extending rearwardly from said top frame member and at least one bottom rail extending rearwardly from said bottom frame member, said drawer comprising: a generally horizontal bottom wall extending to normally substantially vertical front, side and back walls formed integrally with the bottom wall; said drawer Being adapted for support by engagement of the bottom wall with the bottom frame member and the bottom rail; said back wall having a shoulder formed integrally therewith extending substantially across the width of said back wall, said shoulder projecting vertically to a height greater than the spacing between said top and bottom frame members whereby said shoulder will retain said drawer in an open condition in substantially full width engagement with said top frame member; and guide means comprising a groove in said shoulder for receiving said top rail whereby said drawer is guided during entire opening and closing travel so as to prevent skewing of the drawer.
 16. The molded plastic drawer according to claim 15 further characterized by a reinforcing lip extending first outwardly and then downwardly from the back and side walls, said lip extending parallel to the bottom wall along one side wall and around the adjacent rear corner, then upwardly to define one end of the shoulder of the back wall, then parallel to the bottom wall along the top of the shoulder, then downwardly to define one side of the groove, then parallel to the bottom wall to define the bottom of the groove, then upwardly to define the opposite side of the groove, then parallel to the bottom wall along the top of the shoulder, then downwardly to define the opposite end of the shoulder, then parallel to the bottom wall around the opposite rear corner and along the opposite side wall.
 17. The molded plastic drawer according to claim 16 further characterized by opposed, longitudinally disposed, substantially parallel reinforcing ribs extending along the underside of the bottom wall substantially the full length of the drawer for receiving the bottom rail so that the drawer is guided both by the groove in the shoulder and the reinforcing ribs.
 18. A molded plastic drawer adapted for use in a space defined by a front frame having at least parallel top and bottom transversely extending frame members, a top rail extending rearwardly from said top frame member, and at least one bottom rail extending rearwardly from said bottom frame member, said drawer comprising: a generally horizontal bottom wall extending to normally substantially vertical front, side and back walls formed integrally with the bottom wall; said back wall having a shoulder extending substantially across the width of said back wall, said shoulder projecting vertically to a height greater than the spacing between said top and bottom frame members whereby said shoulder will retain the drawer in an open condition by substantially full width engagement with said top frame member; guide means comprising a groove in said shoulder for receiving said top rail whereby said drawer is guided during its entire opening and closing travel so as to prevent skewing of the drawer; and said side and back walls having integrally formed therewith an outwardly turned lip extending first parallel to the bottom wall along one side wall and around the adjacent rear corner, then upwardly to define one end of the shoulder of the back wall, then parallel to the bottom wall along the top of the shoulder, then downwardly to define one side of the groove, then parallel to the bottom wall to define the bottom of the groove, then upwardly to define the opposite side of the groove, then parallel to the bottom wall along the top of the shoulder, then downwardly to define the opposite end of the shoulder, then parallel to the bottom wall around the opposite rear corner and along the opposite side wall.
 19. The molded plastic drawer according to claim 18 further including means on the underside of the bottom wall for receiving the bottom rail so that skewing of the drawer is prevented both by cooperation of the groove in the shoulder with the top rail and by cooperation of the guide means on the underside of the bottom wall with the bottom rail.
 20. The molded plastic drawer according to claim 19 wherein the front wall extends substantiallY perpendicularly to the bottom wall and is adapted to receive drawer hardware, and wherein the back and side walls taper upwardly and outwardly relative to the bottom wall, and further including retaining members extending transversely across the front end of the underside of the bottom wall for substantially full width engagement with the bottom transversely extending member of the front frame to retain the drawer in a closed condition. 